Sorry I'm using a SuperHub 2ac (VMDG490) and that is simple to go to Advanced Settings, and page down the screen to Tools.
Under Tools:
Ping
Trace Route
MTU Settings
I selected Ping which opens another screen, towards the bottom was a tick-box for WAN Ping response which I selected and applied.
Don't you have anything vaguely similar? I would have thought VM would have put their GUI on the this new box.
Did a quick search on VM's forum and found this
about Superhub 3
Maybe they can point you in the right direction
Edited by deleted (Wed 16-Dec-15 12:38:56)